Punching die



April 7,1925. 1,532,926

H.NOTEBOOM PUNCHING DIE Filed April 1924 rfi/ar 2 4 I 4 II III Illllfllllllllliillli. 1

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ubert Noieboom INVENTOR 9': WITNESS: ATTORNEY Patented Apr. "'7, 1925.

UNITED S A-res PAT I;

NT ort-"TIC :eUNcHINe DIE.

Application filed April 12, 1924. Serial 706,197.

To all whom it may concern:

Be it known that I, HUBERT NoTEnooM. a citizen of the United States,residingat Philadelphia, in the county of Philadelphia and State ofPennsylvania, have invented. new and useful Improvements in PunchingDies, ofwhich the following is a specification. p

This invention relates to a punching die, and an object of the inventionis to provide a practical punching die structure, primarily designed foruse in the making of combs of paper fibre or analogous material, such asdisclosed George G. Sowers, filed September 28rd, 1922, Serial No.D-3813, and adaptable for dispensing in the vending machines disclosedin the application for Letters Patent 0f the United States, filed April9th, 1924, Serial No. 705,329. I

In the manufacture of combs of this type, it is necessary that extremecare and precision be exercised in the punching of the combs so as toprevent the rupturing of the points of the teeth during the punchingoperation, and to permit the exercising of care in the forming of thecombs without material hindrance to speed of production.

The improved punch and die structure herein described, has beenconceived, which die includes the suitable opening cut to conform to theconfiguration of the comb, and

it has a stop member located in close proX imity to the tooth formingedge of the open ing, in the die to permit the regulating of thepositioning of the sheet of material, so as to permit speed in theforming of the combs, and ensure precision in the spacing of thematerial.

Other objects of the invention will appear in the following detaildescription, and in the accompanying drawings wherein;

Figure 1- is a top plan of the die. Figure 2 is a section through thedie taken on the line 22 of Figure 1.

Figure 3 is a plan view of the punch.

Figure -t is a side elevation of the punch used in connection with thedie.

Referring more particularly to the drawings, the improved die comprisesthe block 1 which is formed of sections 2 and 3. The sections 2 and 3are provided 'with dowels 4 and semi-cylindrical recesses 5, to permitproper engagement of their inner edges to ensure proper feeding of thesections of the comb forming opening 6, which is cut in in theapplication ofthe die block The opening6 is shaped to completely form acomb of the typeheretotore mentioned, and has the teeth cutting members7 disposed along one side thereof, preferably away from the direc-,-tion in which the material 'is' fed tolthe would be causedif a properbody of material was not left in the sheet of material beyond the pointsof the teeth, and to insure this proper spacing of the material withoutcausing waste 'of the material, a

raised stop 8 is formed centrally on the upper surface of the section 2of the block 1, a predetermined distance from the tooth forming portionof the die opening 6, so as to permit proper spacing of the material toprovide sufficient body between each comb punched without causing awaste of the material. In the drawings only one stop 8 is illustrated,and it is shown as disposed in the transverse center ofthe block with anabrupt end facing the die opening 8, while its opposite end is rounded.

In passing material over the die block 1 for the forming of combs afterthe first comb has been cut from the strip of material which'material'is slipped over the die until the straight edge of the back ofthe. opening formed in the material by the cutting of a comb therefromengagesagalnst the stop 8, which ensureslproper spacing of the materialfor the cutting of the subsequent comb, and thus the operation is continued.

In Figures 3 and 4 of the drawings, the

punch used in connection with the die block I 1 1 is illustrated, andthis'punch comprises the rectangular carrying body. plate 10, which hasthe shank 11 thereon and italso shaped to the exact size of the comb tobe cut, and for co-operation with the dieopening 6.- The cutter 13 isrelativelythick and the teeth 14 thereon are milled uniformly for apredetermined portion of their length, as clearly shown in Figure 4 ofthe drawings, after which they materially increase in thickness towardsthe carrying block 10, thus it will be seen that the has projectinglaterally therefrom, one side thereof, a comb-shaped cutter 13, which isno teeth 14 on the cutter 13, gradually increase in thickness from theirfreeedges, transversely towards distance of uniform thickness, afterWhich i they gradually inclineandincrease in thick-.- ness towards thecarrying'block 10 thereby providing not only the proper shape to thecomb but sufficient body to the cutter itself to ensure longevitythereof. The co-operating ofthe operation of the punch structure and/thedie I structure is j of the usuatand Well-known manner.

. It is, of course; to tie-understood, that the oth ma ner andgthetpa tsasso ia e in diff n re ations, andtherefore, I do" not desire to belimited in any manneryex'cept as set forth in the claim hereuntoappended.

What I claim is: I

A comb forming punch comprising a carryingbody; a coinbgshaped cuttercarried thereby having a plurality of comb tooth forming teeth thereon,which graduallyincrease in thickness from their free edges to the mainbody of the'cutter and are of the uniform thickness at their freeedgeiora predetermined longitudinal distance .after which theygraduallyincrease in thickness n towards. said carrying body. nve ionmay be o structed in various In testimony whereof I afiix my s gnatureREUBER NOTEBOOMY

